Year	Percent
2005-01-01	24.925
2006-01-01	24.025
2007-01-01	23.550
2008-01-01	22.800
2009-01-01	22.375
2010-01-01	21.900
2011-01-01	21.650
2012-01-01	20.950
2013-01-01	20.725
2014-01-01	20.700
2015-01-01	20.725
2016-01-01	20.425
2017-01-01	20.425